[1] [html5] r4351 - [acgiowt] (0) Make itemid='' accept relative URLs. (2009-10-28 03:57:21 +09:00 版) <http://lists.whatwg.org/pipermail/commit-watchers-whatwg.org/2009/003512.html>

[2] [whatwg] Proposal: allow itemid to record multiple identifiers for an item ( (2012-12-05 04:18:56 +09:00 版)) <http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2012-December/038257.html>

[3] WebSchemas/ExternalEnumerations - W3C Wiki ( (2013-06-13 12:01:58 +09:00 版)) <http://www.w3.org/wiki/WebSchemas/ExternalEnumerations>

[4] Web Applications 1.0 r4066 Update microdata based on results of usability study ( (2009-10-03 06:44:00 +09:00 版)) <http://html5.org/tools/web-apps-tracker?from=4065&to=4066>

[5] Web Applications 1.0 r4351 Make itemid= accept relative URLs.]] ( (2009-10-28 03:54:00 +09:00 版)) <http://html5.org/tools/web-apps-tracker?from=4350&to=4351>

[6] Fix #208: remove the Microdata API · whatwg/html@2aaecb8 (2015-10-07 20:14:53 +09:00 版) <https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb>

[7] URLs are parsed and produce records · whatwg/html@30bc255 (2016-02-14 23:01:52 +09:00 版) <https://github.com/whatwg/html/commit/30bc2557105ad62881ec9670f253febbc9761b44>